Envelope



July 27, 1926. I 1,593,679

2:. STEINBERG Y ENVELOPE- Filed July 8, 1925 Hincnuiv' Patented July 27, 1926.

STATES PAT.

SAUL STEINBERG, OF BROOKLYN, INEVV YORK.

ENVELOPE.

application filed July 8, 1925. Serial No. 42,217.

The present invention appertains to envelopes, and the primary object of the invention is to provide an envelope that may be used when. open, as a letter sheet, the envelope being in the form of a folder on which may be printed, written or otherwise placed matter which will be concealed when the envelope is closed, the folder also providin an enclosure in which matter may be p aced to accompany the, printed or written matter.

Another object of the invention is to provide an envelope of the above type with a single flap in one corner adapted to be folded over upon the outside front face of the envelope when folded and to be sealed under the postage stamp so as to prevent unauthorized opening of the envelope Without detection.

A further object of the invention is to provide a combined envelope and letter sheet that may be easily and quickly stamped or cut from sheet paper or other material and readily folded to provide safe and first class mailing matter.

With the above and numerous other objects in view as will appear as the description proceeds, the invention resides in certain novel featuresof construction, and in the combination and arrangement of parts as will be hereinafter more fully described and claimed.

In the drawing- Figure l is a perspective view of the envelope folded embodying the features of my invention,

Fig. 2 is a transverse section therethrough taken substantially on the line 22 of Fig. 1 looking in the direction of the arrow, and

Fig. 3 is a plan of the letter sheet in an open position.

Referring to the drawing in detail, it will be seen that the letter sheet and envelope comprise a substantially rectangular sheet having portions 10, 11, 12 and 13. On the free longitudinal edge of the portions and 12 there is provided a tab 14 extending the full length of this edge and slitted transversely as at 15 to provide an independent section 16. The sheet is folded over upon itself along the dotted lines 17 .so that the sections 1. and 13 register with the sections 10 and 11 respectively.

The body portion of the tab 14; is folded upon itself in this operation. The sections 11 and 13 are then folded upon the folded sections 10 and 12 and the folded body por tion of the tab 14 is inserted between the sections 11 and 13 as is clearly illustrated in both Figs. 1 and. 2 The independent tosection 16, however, is folded-upon the outer surface of the section 11 so that a stamp 17 i may be placed thereover to also cover a portion of the section 11 thereby sealing the envelope against surreptitious opening by unauthorized persons without detection.

It is thought that the construction, utility, and advantages of this invention will now be clearly understood without a more detailed description thereof. The present embodiment of the invention has been described merely ,3 way of example since in practice it attains the features of advantage enumerated as desirble in; the statement of the invention and the above description.

It will be apparent that numerous changes in the details of construction ifiay be resorted to without departing from the spirit or scope of the invention as hereinso after claimed, or sacrificing any of its advantages.

Having thus described my invention, what I claim as new is:-

A combined envelope and letter sheet comprising a rectangular portion adapted to be folded into parallel registration to provide letter sheets and such sheets folded into substantial parallel registration to envelope size so that one portion of one letter 99 sheet forms the back of the envelope and .the other portion of the same sheet forms the front of the envelope, a tab formed on the free edges of two adjacent sheets to be folded-between the front of the envelope and the remaining sheets and slitted to pro vide an independent section adapted to be folded over the outside corner of said front of the envelope so that a stamp may be pasted thereover and over a portion of the front of the envelope to prevent unauthon ized opening of the envelope when. thus sealed.

In testimony whereof I. afix my sigma ture..

SAUL STEINBERG. 

